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- VIRGO
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- INSTRUMENT
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- VIRGO contains two different active-cavity radiometers for monitoring the solar 'constant', two three-channel
- sunphotometers for the measurement of the spectral irradiance at 402, 500, and 862 nm with a bandwidth of 5 nm, and
- low-resolution imager (Luminosity Oscillation Imager) LOI with 12 'scientific' and four guiding pixels, for measuring the
- radiance distribution over the solar disk at 500 nm.
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- VIRGO is made out of the various subunits
- ∑ SPM built by the World Radiation Center of Davos, CH.
- ∑ LOI built by the Space Sciences Department of the European
- Space Agency.
- ∑ PMO6-V built by the World Radiation Center of Davos, CH.
- ∑ DIARAD built by the Royal Meteorological Institute of Belgium,
- Bruxelles.
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